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Six practical chapters. Follow the programme or your curiosity.
016 min026 min037 min048 min057 min068 min
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Turn a first impression into a question you can actually test.
Check the period
Make sure the observations cover the same stretch of time.
Compare the scales
Explain how units and axes shape the picture.
Put change in percentages
Give different starting values a common reference point.
Look beyond the window
Distinguish a selected movement from a broader pattern.
Write a reproducible note
Leave a clear trail from observation to calculation.
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Small steps. Lasting perspective.
Free lessons, practical examples and a starting guide for curious beginners.
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